The Temperature at a State Park for One Day in June

Multiple Choice

The temperature at a state park for one day in June can be approximated by the function $T ( x ) = 0.284 x ^ { 2 } - 5.11 x + 82 \quad 0 \leq x \leq 18$ where T is degrees Fahrenheit and x is the number of hours after 5 PM on Friday. What was the lowest temperature reached? Round to the nearest whole degree.

A) 64 degrees
B) 70 degrees
C) 62 degrees
D) 59 degrees